Decimals and whole numbers are allowed Taken: 0, 0.5, 1, 1.5, 2, 3, 4.5, 5, 7, 8.5, 10, 10.5, 13.5, 14, 15, 17.5 20, 20.5 Not Taken: 2.5, 3.5, 4, 5.5, 6, 6.5, 7.5, 8, 9, 9.5, 11, 11.5, 12, 12.5, 13, 14.5, 15.5, 16, 16.5, 17, 18, 18.5, 19, 19.5
